Online Tracking Ramps Up

Online tracking on 50 of the most-visited websites has risen sharply since 2010, driven in part by the rise of online-advertising auctions, according to a new study by data-management company Krux Digital Inc.

The average visit to a Web page triggered 56 instances of data collection, up from just 10 instances when Krux conducted its initial study, in November 2010. The latest study was conducted last December.